Another question/issue about .DXF files:
If I have a .PLD file with a layer set to Show = False (the small eyeball icon in the Layer List Panel) and I export a .DXF file, it exports the Show = False layer as well. When I import into a 3rd party software, it shows that layer - it probably shouldn't?
The workaround is to delete all your layers with Show = False, then export the .DXF. It would be nicer if you did not have to do that.